Fast increment to the next inline renderer when the current renderer is isolated.

Source/core/rendering/InlineIterator.h

Index: Source/core/rendering/InlineIterator.h
diff --git a/Source/core/rendering/InlineIterator.h b/Source/core/rendering/InlineIterator.h
index d88205ae92425e121e171ac28d5876fa629ad7e0..2cb2eccb51d300bfe1b91929e8eff087ea07d1e3 100644
--- a/Source/core/rendering/InlineIterator.h
+++ b/Source/core/rendering/InlineIterator.h
@@ -35,6 +35,11 @@ namespace WebCore {
 // optionally notifying a BidiResolver every time it steps into/out of a RenderInline.
 class InlineIterator {
 public:
+    enum IncrementRule {
+        FastIncrementInlineRenderer,
+        FastIncrementInTextNode
+    };
+
     InlineIterator()
         : m_root(0)
         , m_obj(0)
@@ -70,7 +75,8 @@ public:
     RenderObject* root() const { return m_root; }
 
     void fastIncrementInTextNode();
-    void increment(InlineBidiResolver* = 0);
+    void fastIncrementInline();

[eseidel, 2013/09/03 23:28:40]

I don't see this used anywhere?

+    void increment(InlineBidiResolver* = 0, IncrementRule = FastIncrementInTextNode);
     bool atEnd() const;
 
     inline bool atTextParagraphSeparator()
@@ -352,11 +358,11 @@ private:
     bool m_atEndOfInline;
 };
 
-inline void InlineIterator::increment(InlineBidiResolver* resolver)
+inline void InlineIterator::increment(InlineBidiResolver* resolver, IncrementRule rule)
 {
     if (!m_obj)
         return;
-    if (m_obj->isText()) {
+    if (m_obj->isText() && rule == FastIncrementInTextNode) {
         fastIncrementInTextNode();
         if (m_pos < toRenderText(m_obj)->textLength())
             return;